package designmodel.strategy.收银策略练习;

/**
 * 收银策略接口
 *
 * @author scylla
 * @version V1.0
 * @project echo -java-base
 * @title 收银策略
 * @package designmodel.strategy.收银策略练习.strategies
 * @since 2021 /12/16 4:53 下午
 */
public interface CashStrategy {

    /**
     * Pay double.
     *
     * @param cash the cash
     * @return the double
     */
    double pay(double cash);

}
